_-RPGEMS-_-FFXI-_-ALLIANCE-

GUILDS

Alchemist	The Alchemists are able to make medicine and refinining materials. A useful guild to have.
Boneworker	The Boneworkers make armor, weapons, and accessories out of the bones of monsters. The materials for making the armor, weapons and accessories are easier to find, and therfore, the items will be of less quality than that of the armor, weapons, and accessories made from a Blacksmith.
Blacksmith	The Blacksmith is able to make good quality, valuable, armor, weapons and accessories from metals. The materials for blacksmithing are harder to come by than the materials used for Boneworking. The Bastok Mines are an example of a source of precious metals and minerals. The product of these materials are made for the heavier type of character (not for Taru-Taru but for the Galka for example)
Carpenter	The Carpenter is able to make things from wood, like furniture for your Moogle House and arrows for Rangers.
Cooking	Cooking pretty much explains itself. Cooks are able to make foods that have multiple (positive) status effects. Such as: HP and TP restoration etc. This can be very useful (also cheap in the ways of materials) guild to have.
Fisher	Fishing would be a good secondary guild to have as a cook. You can catch fish, and then cook them and then feel the effects of your labour. You can receive items, catch fish (of course...) and also catch monsters, which you will then have to fight.
Jewler	Makes accessories (rings, armlets, anklets, necklaces etc.) from minerals, that will have a positive impact on your status (i.e. raising you health by a given percentage.) This is a pretty useful guild to obtain.
Skinworker	A skinworker produces leather armor, robes, and hats. This may not be the most useful guild, for say a Galka of a Dark Knight, but it would be useful for the more lighter characters (i.e. a Taru Taru.)
Tailor	The Tailor does basically the same thing as the Skinworker guild, but it provides a little less quality with the items produced from the Skinworker guild.